RESUMO
Objectives To determine the average serum periostin level in children with asthma between 6 and 16 y of age, and to fnd out if the levels correlated with markers of eosinophilic infammation, asthma control, and severity. Methods Children under follow-up at a tertiary care centre were enrolled. Children with conditions causing elevated serum periostin other than asthma, or history of systemic steroid use in the past 6 mo were excluded. Serum total IgE and periostin were estimated by ELISA. Results The median (IQR) serum periostin level was 52.6 (45.4, 58.3) ng/mL. Levels did not vary with age, gender, duration of symptoms, positive family history, or history of exacerbations in the last 6 mo. There was no signifcant correlation with anthropometric parameters or their z scores, or markers of eosinophilic infammation in blood including serum total IgE, eosinophil percentage or absolute eosinophil count. There was no diference in median periostin levels of children with diferent asthma symptom control or asthma severity. Conclusions In a group of 26 Indian children with physician-diagnosed asthma, serum periostin showed no signifcant correlation to markers of eosinophilic infammation.
RESUMO
Measurement of Fractional exhaled nitric oxide (FeNO) is a noninvasive,simple,and reproducible procedure to assist in assessment of disease severity and evaluation of response to treatment in asthma children.This review discusses the value of FeNO in children with asthma,and the association between FeNO and other noninvasive methods.